This Tesla's invention, i don't know a real purpose of his design, could be used as perfect "Halo" effect booster, kind of special antenna, installed at frontend of any
working LRL, instead all other known antenna types. This special Tesla's coil configuration with easy give 110dB voltage gain (cca 250000 x).
Translate to natural LRL language, it mean, many miles detection distance.
This Tesla's bifilar coil act like LRL antenna should be wounded in pancake coil form.
Tesla's Bifilar coil patent #512340
https://teslauniverse.com/sites/defa...s/00512340.pdf
Best regards
Dub-ulu-mach